MP3367

– 6-CHANNEL BOOST WLED DRIVER WITH HIGH DIM RATIO AND I2C

MP3367 Rev. 1.0

www.MonolithicPower.com

5

6/17/2019

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PIN FUNCTIONS (continued)

QFN-24

Pin #

TSSOP28-

EP Pin #

Name

Description

9

13

ISET

LED current setting. Tie a current-setting resistor from ISET to GND to

program the current in each LED string.

10

14

AGND

Analog ground.

11

15

LED6

LED string 6 current input. Connect the LED string 6 cathode to this pin.

12

16

LED5

LED string 5 current input. Connect the LED string 5 cathode to this pin.

13

17

LED4

LED string 4 current input. Connect the LED string 4 cathode to this pin.

14

18

LED3

LED string 3 current input. Connect the LED string 3 cathode to this pin.

15

19

LED2

LED string 2 current input. Connect the LED string 2 cathode to this pin.

16

20

LED1

LED string 1 current input. Connect the LED string 1 cathode to this pin.

17

21

PGND

Step-up converter power ground.

18

23

SW

Drain for the internal low-side MOSFET switch. Connect the power

inductor to SW.

19

25

OVP

Over-voltage protection pin. Connect a resistor divider from OVP to GND

to program the OVP threshold.

20

26

STH

Short LED protection threshold set pin. STH is a current source output

(18

μA). Connect a resistor to program its voltage. Float this pin if the internal

short LED protection threshold set register TH_S 1:0 is used.

21

27

FSP

Switching frequency spread spectrum pin. FSP is a current source output

(18

μA). Connect a resistor to program its voltage. Float this pin to follow the

internal register setting.

22

28

VCC

5V LDO output pin. VCC provides power for the internal logic and gate

driver. Place a ceramic capacitor as close to this pin as possible to reduce

noise.

23

1

SD

External disconnect PMOS gate drive pin. Turn off the external PMOS in

fault condition. Float this pin if not used.

24

3

VIN

Power supply input. VIN supplies power to the IC.

2, 4, 22, 24

NC

No connection.

Exposed

pad

Exposed

pad

AGND

Chip ground. Connect exposed pad to AGND.